* Feeling of unrealness or like seeing things from outside yourself
* A sense of impending doom with no obvious reason
* Fear of losing control and/or doing something embarrassing
* Fear of dying
A panic attack typically lasts for several minutes and is one of the most distressing conditions that a person can experience. Most who have one attack will have others. When someone has repeated attacks, or feels severe anxiety about having another attack, he or she is said to have panic disorder.
Links to some good help pages
Spiroll's Panic Page
Excellant Page with emergency help phone numbers and many help sites. Included on this site is a link for a email support group
Support 4 Panic
A very informative source for every angle of panic disorder and anxiety